What Gender/Speckled Sussex Chicks

I purchased two 3 day old SS chicks on April 24th.
They are supposed to be pullets.
Looking at them now...I believe I have a boy and a girl.
One is significantly bigger than the other, has a pronounced comb, brighter plumage and huge feet! The tail feathers are carried high.
The other is smaller and lighter. Dainty feet. Has a smaller comb. Long tail feathers are carried horizontal.
I have to figure out how to upload images as I am a new forum member.

As awkward as it feels posting a picture of my toilet....this is the most recent picture of the kids. I must say they had a ball sliding off the edge and jumping back up over and over again. The cat made sure no one was being too pushy.
I'll try to get a better picture posted.

Hey I have two exactly like them same description to the letter! lol I thought the differences in mine was due to trouble hatching, I had to rescue both of mine from there shells and they had a rough start, Maybe not! I will be very interested to see what folks say, sorry that I can't help you with the sexing because Im lost when it comes to them.

Thank you all so very much for your responses and kind words!
My camera is very old and it's difficult to get head shots!
For what it's worth....please refer to the images below
My girl
My boy?

A friend of mine has agreed to take the male once he reaches crowing age. I would love to keep him, but in my urban setting, that wouldn't go over well with the neighbors. I know the female will be heartbroken